cleft sternum

https://doi.org/10.1351/goldbook.10535

Rare congenital malformation resulting from defective fusion in the embryo of paired mesodermal bands in the ventral midline.

Source:
PAC, 2016, 88, 713. (Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)) on page 737 [Terms] [Paper]